REBECCA Chiu Wing-yin's quest for a clean sweep of all three legs of the Dunlop Squash Grand Prix was dashed at the last hurdle by current Hong Kong champion Harriet Wilcox. The 16-year-old stayed in line for the ''triple crown'' by overwhelming Hong Kong internationals Eunice Bond and Catherine Radcliffe in her first two matches to set up another title decider with Harriet. Rebecca was strongly fancied for honours as she had defeated Harriet in the finals of the first two tournaments, but this time the Philippine international upset the apple-cart in winning 4-9, 9-7, 9-5, 7-9, 9-3. Jockey Club Ti-I College student Rebecca, however, still captured the overall title on the strength of her two previous triumphs. There was also an upset in the men's division, but top junior Wong Wai-hang hung on for the overall crown despite being defeated in the final. Top-seeded Wai-hang, the first leg winner who went down to Sunny Poon Yat-sing in the final of the second tournament, came up against his coach Fayyaz Mohammad in the final this time and lost 9-8, 9-7, 9-6. However, his consistency in winning one tournament and placing second in the other two was good enough to land him the overall championship, ahead of Sunny and Mohammad. Vincent Cheung Cheuk-yin and Christina Mak completed clean sweeps in the junior boys' and girls' divisions on their way to the series' crowns. Vincent demolished La Salle College schoolmate Adrian Fong Tin-yau 9-7, 9-5, 9-0 in the boys' final, while Christina Mak of Tak Nga Secondary School overcame a slow start to beat Heep Yunn School's Michelle Ma 8-10, 9-4, 9-2, 9-0.